Finding the Fourth Proportional to 1,789.86, 2,685.35 and 803.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,789.86 : 2,685.35 = 803.50 : x
2. Step 2: Convert to fraction form
   1,789.86/2,685.35 = 803.50/x
3. Step 3: Cross multiply
   1,789.86x = 2,685.35 × 803.50
4. Step 4: Simplify right side
   1,789.86x = 2,157,678.73
5. Step 5: Solve for x
   x = 2,157,678.73/1,789.86
6. Step 6: Final answer
   x = 1,205.50